A silicon carbide composite that is lightweight and has high thermal conductivity as well as a low thermal expansion coefficient close to that of a ceramic substrate, particularly a silicon carbide composite material suitable for heat dissipating components that are required to be particularly free of warping, such as heat sinks. A method for manufacturing a silicon carbide composite obtained by impregnating a porous silicon carbide molded body with a metal having aluminum as a main component, wherein the method for manufacturing a silicon carbide composite material is characterized in that the porous silicon carbide molded article is formed by a wet molding method, and preferably the wet molding method is a wet press method or is a wet casting method.

The present disclosure provides additives capable of undergoing a peritectic reaction with boron in aluminum-boron carbide composite materials. The additive may be selected from the group consisting of vanadium, zirconium, niobium, strontium, chromium, molybdenum, hafnium, scandium, tantalum, tungsten and combination thereof, is used to maintain the fluidity of the molten composite material, prior to casting, to facilitate castability.

The invention relates to a method for producing a cooling device (10), which has at least one hollow body (30) made of a first material having good thermal conduction and a base body made of a second material having good thermal conduction, and a pre-product for the production of a cooling device (10) and a cooling device (10) for an electrical assembly and an electrical assembly having a cooling device of this kind. The hollow body (30) is coated on the outside with a third material and is filled on the inside with the third material, which has a lower melting temperature than the first material and the second material, wherein the filling (5) completely fills the hollow body and is then cooled, wherein the filled hollow body (30) is placed in a die-casting mould, wherein the second material is introduced into the die-casting mould as die casting with a first temperature and flows around the hollow body (30) at least partially, wherein the die casting melts off the third material of the surface coating (36) and melts on the first material of the hollow body (30) so that at least in regions an integral connection is formed between the die casting of the second material, which forms the base body (20), and the first material of the hollow body (30), wherein the die casting of the second material becomes rigid and solid, wherein during the solidification phase, the die casting of the second material heats the filling (5) made of the third material in the interior of the hollow body (30) until the melting temperature is reached, and wherein the melted third material is removed from the hollow body (30) under pressure.

An aluminum alloy consisting essentially of from greater than 6 wt % to about 12.5 wt % silicon; iron present in an amount up to 0.15 wt %; from about 0.1 wt % to about 0.4 wt % chromium; from about 0.1 wt % to about 3 wt % copper; from about 0.1 wt % to about 0.5 wt % magnesium; from about 0.05 wt % to about 0.1 wt % titanium; less than 0.01 wt % of strontium; and a balance of aluminum and inevitable impurities. The aluminum alloy contains no vanadium. A method for increasing ductility and strength of an aluminum alloy without using vacuum and a T7 heat treatment, the method comprising: casting the molten aluminum alloy by a high pressure die-cast process to form a cast structure. The structural castings formed of the aluminum alloy composition disclosed herein exhibit desirable mechanical properties, such as high strength and high ductility/elongation.

The present disclosure provides a semi-solid die-casting aluminum alloy and a method for preparing a semi-solid die-casting aluminum alloy casting. The semi-solid die-casting aluminum alloy contains alloying elements, inevitable impurities and the balance of aluminum element. Based on the total weight of the semi-solid die-casting aluminum alloy, the alloying elements include: 7.5 to 9.5 wt % of Si, 3.5 to 4.8 wt % of Cu, 0.5 to 0.75 wt % of Mn, 0.01 to 0.5 wt % of Ti and 0.01 to 0.35 wt % of rare earth element.

A system and method of manufacturing an aluminum fuel cell cradle are provided. The method comprises providing a negative cast mold having cavities to form the cradle, and comprises providing a feeding mechanism disposed about the mold and in fluid communication with the cavities thereof. The feeding mechanism comprises a plurality of primary risers connected to and in fluid communication with cavities. The method further comprises melting a first metallic material to define a molten metallic material, and comprises moving the mold to a vertical casting orientation about a rotational axis, while feeding molten metallic material through the runner to the cavities. The method further comprises cooling the molten metallic material to define a solidified metallic material. A second solidification time in the risers is greater than a first solidification time in the mold such that shrinkage of the solidified metallic material occurs in the risers away from the mold.

A method for recycling an aluminum alloy scrap includes performing selective oxidation roasting and washing treatment on the aluminum alloy scrap to obtain an uncoated aluminum alloy scrap; melting the uncoated aluminum alloy scrap in a refining furnace to obtain aluminum alloy melt liquid, online-detecting components of the aluminum alloy melt liquid and adding a metallic copper, a copper alloy, a magnesium alloy or a zinc alloy to the aluminum alloy melt liquid according to the requirements of target alloy components, performing pressure-controlled and oxygen-controlled melting through regulating pressure intensity and oxygen partial pressure in the refining furnace and coupling an external-field stirring mode to obtain refining aluminum alloy melt liquid; filtering the refining aluminum alloy melt liquid, to obtain an aluminum alloy melt with the target alloy components; and casting the aluminum alloy melt.

The invention is directed to the interventionless activation of wellbore devices using dissolving and/or degrading and/or expanding structural materials. Engineered response materials, such as those that dissolve and/or degrade or expand upon exposure to specific environment, can be used to centralize a device in a wellbore.

A clutch device includes a pressure plate movable toward or away from a clutch center and rotatable with respect to the clutch center. The pressure plate includes a flange extending radially outward from an outer circumferential edge of a body, pressure-side fitting teeth projecting in a first direction from a front surface of the flange, holding input-side rotating plates and output-side rotating plates, and circumferentially arranged, and a flange-side recessed portion recessed in the first direction from a back surface of the flange. As seen in an axial direction of an output shaft, the flange-side recessed portion at least partially overlaps one of the pressure-side fitting teeth.

A clutch device includes a pressure plate movable toward or away from a clutch center and rotatable with respect to the clutch center. The pressure plate includes a flange extending radially outward from an outer circumferential edge of a body, pressure-side fitting teeth projecting in a first direction from a front surface of the flange, holding input-side rotating plates and output-side rotating plates, and circumferentially arranged, and a flange-side recessed portion recessed in the first direction from a back surface of the flange. As seen in an axial direction of an output shaft, the flange-side recessed portion at least partially overlaps one of the pressure-side fitting teeth.